Abstract
The 61Cu (61Ni) emission Mössbauer spectra of high-temperature superconducting ceramics are measured, as well as a number of dielectric and antiferromagnetic cupric metal oxides, which are structural analogues of high-temperature superconductors. The 61Ni nuclei quadrupole coupling constants are determined and their linear correlations are established with the calculated values of the lattice electric field gradient tensor (EFG) created in the copper sites. Linear correlations are found between the 61Ni and 63Cu nuclei quadrupole coupling constants, which make it possible to determine the valence contribution to the EFG for the both probes.
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Bordovsky, G.A., Marchenko, A.V., Nasredinov, F.S. et al. 61Ni and 63Cu Hyperfine Coupling in Copper Sites of Superconducting Cupric Ceramic Metallic Oxides and Their Dielectric Analogues. Glass Phys Chem 46, 170–175 (2020). https://doi.org/10.1134/S1087659620020029
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DOI: https://doi.org/10.1134/S1087659620020029